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Ferrite

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

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TryML00097 corrosion ML00122 brittle fracture ductile behavior fatigue hydrogen fracture embrittlement stress corrosion

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Capture method2

Nital Etched Micrography by OM1 image
Optical Microscope1 image

Microstructure28

Tempered Martensite10 cases
Austenite9 cases
Ferritic Bainitic5 cases
Ferritic pearlitic5 cases
Bainite4 cases
Duplex Ferritic Austenitic4 cases
Martensite4 cases
Aged Martensite3 cases

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Dendritic3 cases
Granular3 cases
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Strain Hardened3 cases
Alpha2 cases
Austeno ferritic2 cases
Coarse Structure2 cases
Pearlitic2 cases
Precipitation Hardened2 cases
Refined ferritic2 cases
Small Amount of Delta Phase2 cases
Acicular Ferrite1 case
Anisotropy1 case
Coating Layer1 case
Degradated1 case
Detrimental phases1 case
Ferritic1 case
Heterogeneous granulometry1 case
Pearlite Highly Strained1 case
Zinc Layer1 case

Standard74

UNS23 cases
ASTM13 cases
A12 cases
AISI9 cases
ALLOY6 cases
5375 cases
API5 cases
Class 15 cases

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Product33

Finished Product24 cases
Raw Material20 cases
Welded Joint7 cases
Rolled Plate5 cases
Bolt4 cases
Forging4 cases
Pipe4 cases
Cladding3 cases

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Fabrication Weld3 cases
Fastener3 cases
Spring3 cases
Bar2 cases
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Shaft2 cases
Wire Rope2 cases
Allen Stud1 case
Blade1 case
Case1 case
Casting1 case
Fitting1 case
Machined Part1 case
Nut1 case
Piping spool1 case
Pressure Vessel1 case
Seamless tube1 case
Stud1 case
Tool1 case
Tube1 case
Tubular Forging1 case
Valve Body1 case
Welded Testpiece for Qualification1 case
Wire1 case

Condition26

Damage25 cases
Sound10 cases
Corrosion8 cases
Hydrogen8 cases
Hydrogen Embrittlement7 cases
Typical manufacturing7 cases
Fabrication Defect4 cases
Brittle Behavior3 cases

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Brittle Behavior3 cases
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Removed From Service2 cases
Stress Corrosion2 cases
Used2 cases
Corrosion Fatigue1 case
Crevice1 case
Fatigue1 case
Heat Treatment Defect1 case
Hydride Formation1 case
Localized Dissolution1 case
Non qualified1 case
Not according to spec1 case
Vibration Induced Fatigue1 case
Wear1 case
Welding Defect1 case
WPS1 case

Material26

Ferrous Alloys31 cases
Low Alloy Steel16 cases
High Alloy Steel10 cases
Low Alloy Medium Carbon QT8 cases
CMn Steel5 cases
Non Ferrous Alloys5 cases
Carbon Steel4 cases
Austenitic Stainless Steel3 cases

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Nickel Alloy3 cases
NiCrFe Alloy3 cases
Precipitation Hardened Stainless Steel3 cases
Combinations2 cases
High Carbon Steel2 cases
LAS / Ni Alloy2 cases
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Super Duplex Stainless Steel2 cases
Aluminum Bronze1 case
Copper Alloy1 case
High Strength Low Alloy1 case
Low Carbon Steel1 case
Medium Carbon Steel1 case
Medium Carbon Tool Steel1 case
Microalloyed Steel1 case
Titanium Alloy1 case
Tool Steel1 case
Unalloyed Titanium1 case

Atlas / Detail focus / Microstructure / Ferrite

Application: Oil and Gas ×clear all

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Micrographic detail of the weld metal at the root of the joint showing a mixture of acicular structure with equiaxial ferritic structure. The hardness level in this region is about 231HV10.

34

ML00129 / Apr.2018

Non qualified WPS for High Strength Steel

M - Low Alloy Medium Carbon QTP - Welded Testpiece for QualificationAp - Oil and GasCd - Non qualified

Cm - Nital Etched Micrography by OMDf - Ferrite

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